JP2014199819A - Illumination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate replacement of a light source by simplifying structure while stabilizing the length between the light source and an incidence surface of a light guide.SOLUTION: In a surface light-emitting illumination device, a plate 22 of a light guide unit 12 includes a pair of protrusions 51. An engagement piece is formed on a tip end of each protrusion 51. A reception hole is provided in each end portion of a surface of a lamp holder 32 of a light source unit 13. Each protrusion 51 protrudes from an incident surface of a light guide 21 toward a surface of the lamp holder 32 such that a predetermined distance is kept between the incident surface of the light guide 21 of the light guide unit 12 and an LED surface of an LED module and the engagement piece on the tip end thereof is fitted into the reception hole in a surface of the lamp holder 32.

Description

  The present invention relates to a lighting fixture. The present invention particularly relates to a surface emitting lighting fixture.

  In a planar illumination device in which light from a light source is incident from the light incident surface of the light guide plate and is emitted from the light exit surface of the light guide plate as planar light, the distance between the light source and the light incident surface of the light guide plate is constant. In order to maintain the light source, there is a technique of fixing the light source and the light guide plate integrally with a fixing member and a plurality of screws and fixing pins (see, for example, Patent Document 1).

JP 2009-93939 A JP 2009-199871 A JP 2008-108622 A

  The conventional technique has a problem that the structure for fixing the light source and the light guide plate integrally is complicated, and it is difficult to replace the light source.

  An object of the present invention is, for example, to simplify the structure and facilitate replacement of the light source while keeping the distance between the light source and the incident surface of the light guide constant.

A lighting apparatus according to one aspect of the present invention includes:
A light source that emits light from the surface;
A longitudinal light source installation part in which the light source is installed on the surface;
A light guide having a flat plate shape that receives light emitted from the light source from an incident surface that is an end surface facing the surface of the light source installation portion, and emits light incident from the incident surface from one plate surface. A light guide that
A light guide support part for supporting the light guide, wherein the light source installation part is disposed from the incident surface of the light guide so that a gap is provided between the incident surface of the light guide and the surface of the light source. And a light guide support portion having a pair of convex portions whose front ends are in contact with respective longitudinal end portions of the surface of the light source installation portion.

  According to one aspect of the present invention, the light guide support portion is on the surface side of the light source installation portion with respect to the light guide entrance surface so that a gap is provided between the light guide entrance surface and the light source surface. And having a pair of convex portions whose tips are in contact with the respective longitudinal ends of the surface of the light source installation portion, so that the distance between the light source and the incident surface of the light guide is kept constant, and the structure It is possible to facilitate the replacement of the light source.

The lighting fixture which concerns on Embodiment 1 (a) Top view, (b) Front view, (c) Bottom view, (d) Side view, (e) Rear view, (f) Perspective view. FIG. 3 is an exploded perspective view of the lighting apparatus according to Embodiment 1. (A) The front perspective view of a light guide unit of the lighting fixture which concerns on Embodiment 1, (b) The back perspective view of a light guide unit. FIG. 3 is a perspective view of a light source unit of the lighting fixture according to Embodiment 1. The perspective view of the state which removed the frame of the lighting fixture which concerns on Embodiment 1. FIG. The front view of the state which removed the frame of the lighting fixture which concerns on Embodiment 2. FIG. (A) Perspective view of the lighting fixture which concerns on Embodiment 3, (b) An exploded perspective view.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
1A is a top view of the lighting fixture 10 according to the present embodiment, FIG. 1B is a front view of the lighting fixture 10, FIG. 1C is a bottom view of the lighting fixture 10, and FIG. FIG. 1D is a side view of the lighting fixture 10, and FIG. 1E is a rear view of the lighting fixture 10. FIG. 1F is a perspective view of the lighting fixture 10. FIG. 2 is an exploded perspective view of the lighting fixture 10. FIG. 3A is a front perspective view of the light guide unit 12 of the lighting fixture 10, and FIG. 3B is a rear perspective view of the light guide unit 12 of the lighting fixture 10. FIG. 4 is a perspective view of the light source unit 13 of the lighting fixture 10. FIG. 5 is a perspective view of the lighting apparatus 10 with the frame 14 removed.

  In the present embodiment, the lighting fixture 10 is a surface emitting lighting fixture, and includes a box-shaped fixture main body 11, a removable light guide unit 12, a removable light source unit 13, and a removable frame 14.

  As shown to Fig.1 (a) and (e), on the upper surface and the back surface of the instrument main body 11, the knockout 11a for power supplies and the knockout 11b for attachment are arrange | positioned. By removing the knockout 11a for the power source where necessary, a power hole for inserting a power line connected to an external commercial power source into the lighting fixture 10 can be opened at that location. Moreover, by removing the knockout 11b for attachment at a necessary location, an attachment hole into which a pin, a screw, or the like for attaching the luminaire 10 to the ceiling or wall is inserted is provided at that location. As described above, the present embodiment employs a structure in which the instrument main body 11 is provided with a knockout so that a power supply hole into which the power supply line is not inserted and a mounting hole into which no pin or screw is inserted cannot be opened in the instrument main body 11. doing. Therefore, the power supply hole and the mounting hole do not impair the beauty.

  As shown in FIG. 2, a lighting unit 15 and a terminal block 16 are disposed in the instrument main body 11. Electric power from an external commercial power supply is supplied to the lighting unit 15 via the terminal block 16, and the LED module 31 of the light source unit 13 is lit by the lighting unit 15. A hook 11c such as a pin is attached to the instrument body 11.

  As shown in FIG. 2, the light source unit 13 is screwed to the instrument body 11. For example, a structure may be employed in which a dharma hole is added to the light source unit 13, a hook portion such as a pin is attached to the instrument body 11, and the dharma hole of the light source unit 13 is hooked on the hook portion of the instrument body 11. In this case, it becomes easier to attach and detach.

  As shown in FIG. 4, the light source unit 13 includes an LED module 31 and a long lamp holder 32 (an example of a light source installation unit). Here, the light source unit 13 includes two LED modules 31, but may include one, three, or more LED modules 31. The LED module 31 includes a plurality of LEDs 31a (an example of a light source) that emit light from the surface, and a substrate 31b on which each LED 31a is mounted. A receiving hole 32a is provided at each end of the lamp holder 32 in the longitudinal direction.

  As shown in FIG. 2, the light guide unit 12 is provided with a dharma hole 12a. The light guide unit 12 is attached to the instrument main body 11 by hooking the Dalma hole 12a to the hook 11c of the instrument main body 11 so as to cover the opening on the front surface of the instrument main body 11. The light guide unit 12 is mounted above the light source unit 13, and when the LED module 31 of the light source unit 13 is turned on, light emitted from the LED module 31 is incident and emitted in a planar shape from the front surface. As described above, since the structure in which the light guide unit 12 is hooked on the instrument main body 11 is adopted, it is easy to attach and detach. Further, the light guide unit 12 approaches the light source unit 13 by its own weight.

  As shown in FIGS. 3A and 3B, the light guide unit 12 includes a flat light guide 21, a plate 22, and a metal fitting 23.

  The light guide 21 is stacked in front of the plate 22 and fixed by being pressed by the metal fitting 23 (the plate 22 and the metal fitting 23 are examples of a light guide support portion that supports the light guide). The light guide 21 makes the light emitted by the LED 31a of the LED module 31 of the light source unit 13 incident from the incident surface 21a. And the light guide 21 radiate | emits the light which injected from the entrance plane 21a from the output surface 21b. The incident surface 21a is an end surface (lower end surface) that faces the surface of the lamp holder 32 of the light source unit 13 (the surface on which the LED 31a is installed together with the LED module 31) among the end surfaces (upper, lower, left, and right end surfaces) of the light guide 21. It is. Outgoing surface 21b is the front plate surface among the plate surfaces (two front and rear plate surfaces) of light guide 21. Resin is used as the material of the light guide 21, and dot printing is performed on the back surface (rear plate surface) of the light guide 21 with white matte ink. The light guide 21 refracts the light incident from the incident surface 21a inside, reflects the light at a portion where dot printing is performed, and radiates the light from the emitting surface 21b substantially uniformly.

  The plate 22 is made of a steel plate and is painted white. Thereby, the light incident on the light guide 21 is reflected, and the emission efficiency of the light guide 21 is improved. The plate 22 has a pair of protrusions 51 (an example of a convex portion). The protrusion 51 is formed on the surface of the lamp holder 32 from the incident surface 21a of the light guide 21 so that a predetermined distance is provided between the incident surface 21a of the light guide 21 and the surface (light emitting surface) of the LED 31a of the LED module 31. It protrudes to the side, and the tip contacts each end of the surface of the lamp holder 32 in the longitudinal direction. That is, the protrusion 51 is located between the light guide 21 and the lamp holder 32, prevents the light guide 21 from falling, and is placed on the light guide 21 and the lamp holder 32 by hitting the lamp holder 32. The distance between the LED module 31 and the LED 31a can be kept constant. Thereby, even when the light guide unit 12 and the light source unit 13 are repeatedly attached and detached, the brightness of the light of the lighting fixture 10 can be kept constant every time, and the light guide 21 hits the LED 31a and the LED 31a is damaged. The situation can be prevented. Moreover, in this Embodiment, since the light guide 21 does not hit the board | substrate 31b of the LED module 31, the situation where the board | substrate 31b is damaged can also be prevented. In addition, when the board | substrate 31b is extended to the edge part of the lamp holder 32, you may make it the front-end | tip of the processus | protrusion 51 contact each edge part of the longitudinal direction of the surface of the board | substrate 31b.

  As shown in FIGS. 3A and 5, in the present embodiment, a locking piece 51 a is formed at the tip of the protrusion 51, and the locking piece 51 a is formed at each end of the surface of the lamp holder 32. It fits in the provided receiving hole 32a. Thereby, the position of the light guide unit 12 in the front-rear direction with respect to the light source unit 13 can be determined, and the brightness of the light of the lighting fixture 10 can be further stabilized. The same effect can be obtained even if the receiving hole 32a is replaced with a recess.

  In addition, the positional relationship between the light guide unit 12 and the light source unit 13 is not limited to the relationship that the former is on and the latter is on the bottom, but may be a relationship that the former is on the bottom and the latter is on the top. In the present embodiment, since the light guide unit 12 is mounted above the light source unit 13, the protrusions 51 of the plate 22 are formed on the surface of the lamp holder 32 of the light source unit 13 by the weight of the light guide unit 12. The end will be pressed. Therefore, the effect of keeping constant the distance between the light guide 21 and the LED 31a of the LED module 31 installed in the lamp holder 32 can be obtained more reliably.

  The frame 14 is attached to the outer peripheral portion of the instrument body 11. By attaching the frame 14, the appearance of the lighting fixture 10 can be beautifully shown.

Embodiment 2. FIG.
In the present embodiment, differences from the first embodiment will be mainly described.

  FIG. 6 is a front view of the lighting apparatus 10 according to the present embodiment with the frame 14 removed.

  In Embodiment 1, the plate 22 of the light guide unit 12 of the lighting fixture 10 has a pair of protrusions 51. However, in this embodiment, the light guide 21 of the light guide unit 12 is a pair. The protrusion 51 is provided. The protrusion 51 is a substrate of the LED module 31 from the incident surface 21a of the light guide 21 so that a predetermined interval is provided between the incident surface 21a of the light guide 21 and the surface (light emitting surface) of the LED 31a of the LED module 31. It protrudes to the surface side of 31b (example of a light source installation part), and a front-end | tip contacts each edge part of the surface of the board | substrate 31b of the LED module 31. FIG.

  As shown in FIG. 6, the light guide 21 has a notch 52 whose inner wall becomes the incident surface 21 a at the end facing the substrate 31 b of the LED module 31 of the light source unit 13. A portion other than the notch 52 at the end forms the pair of protrusions 51 described above. The protrusion 51 is located between the light guide 21 and the substrate 31b of the LED module 31, and prevents the light guide 21 from falling. Further, the notch 52 can keep the distance between the light guide 21 and the LED 31a installed (mounted) on the substrate 31b of the LED module 31 constant. Thereby, even when the light guide unit 12 and the light source unit 13 are repeatedly attached and detached, the brightness of the light of the lighting fixture 10 can be kept constant every time, and the light guide 21 hits the LED 31a and the LED 31a is damaged. The situation can be prevented.

Embodiment 3 FIG.
In the present embodiment, differences from the first embodiment will be mainly described.

  Fig.7 (a) is a perspective view of the lighting fixture 10 which concerns on this Embodiment. FIG. 7B is an exploded perspective view of the lighting fixture 10.

  In the present embodiment, the luminaire 10 is a guide light.

  As illustrated in FIG. 7B, the lighting fixture 10 includes a storage battery 17 in the fixture body 11 that supplies power to the lighting unit 15 when the commercial power supply is shut off. Moreover, the lighting fixture 10 is provided with the display panel 18 which is the flat plate made from the acrylic resin by which the design of the evacuation guidance which shows an emergency exit etc. was printed on the frame 14. FIG.

  As in the first embodiment, since the plate 22 of the light guide unit 12 has a pair of protrusions 51, the distance between the light guide 21 and the LED 31a of the LED module 31 installed in the lamp holder 32 is constant. Can be kept in. Thereby, even if attachment / detachment of the light guide unit 12 or the light source unit 13 is repeated, the display panel 18 can be illuminated with the same brightness every time.

  As mentioned above, although embodiment of this invention was described, you may implement combining 2 or more embodiment among these. Alternatively, one of these embodiments may be partially implemented. Or you may implement combining two or more embodiment among these partially.

  DESCRIPTION OF SYMBOLS 10 Lighting fixture, 11 Appliance main body, 11a Knockout for power supply, 11b Knockout for attachment, 11c Hook part, 12 Light guide unit, 12a Dharma hole, 13 Light source unit, 14 Frame, 15 Lighting unit, 16 Terminal block, 17 Storage battery, 18 display panel, 21 light guide, 21a incident surface, 21b emission surface, 22 plate, 23 metal fitting, 31 LED module, 31a LED, 31b substrate, 32 lamp holder, 32a receiving hole, 51 protrusion, 51a locking piece, 52 Notch.

Claims (4)

A light source that emits light from the surface;
A longitudinal light source installation part in which the light source is installed on the surface;
A light guide having a flat plate shape that receives light emitted from the light source from an incident surface that is an end surface facing the surface of the light source installation portion, and emits light incident from the incident surface from one plate surface. A light guide that
A light guide support part for supporting the light guide, wherein the light source installation part is disposed from the incident surface of the light guide so that a gap is provided between the incident surface of the light guide and the surface of the light source. And a light guide support portion having a pair of convex portions whose front ends are in contact with respective longitudinal end portions of the surface of the light source installation portion.   The lighting fixture according to claim 1, wherein a pair of through holes into which the pair of convex portions are fitted are provided at each end in the longitudinal direction of the surface of the light source installation portion. The lighting fixture includes a light guide unit including the light guide and the light guide support unit above the light source installation unit,
3. The lighting apparatus according to claim 1, wherein the pair of convex portions press each end in the longitudinal direction of the surface of the light source installation portion by the weight of the light guide unit.   The lighting fixture of any one of Claim 1 to 3 which has a marker board with the pattern for evacuation guidance to the front surface of the said light guide.

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